Actually pass in the PIO key for auto-publishing (#652)

Need to manually list the secrets to export to the environment.

Author: earlephilhower

.github/workflows/release-to-publish.yml

@@ -36,6 +36,7 @@ jobs:
         TRAVIS_BUILD_DIR: ${{ github.workspace }}
         BUILD_TYPE: package
         CI_GITHUB_API_KEY: ${{ secrets.GITHUB_TOKEN }}
+        PLATFORMIO_AUTH_TOKEN: ${{ secrets.PLATFORMIO_AUTH_TOKEN }}
       run: |
            pip3 install PyGithub
            TAG=$(git describe --exact-match --tags)